RDB2RDF Working Group

The mission of the RDB2RDF Working
Group, part of the Semantic Web Activity, is to
standardize languages for mapping relational data and relational
database schemas into RDF and OWL. The two languages are the Direct
Mapping (DM) and the RDB2RDF Mapping Language (R2RML).

This document surveys the current
techniques, tools and applications for mapping between Relational
Databases (RDB) and Resource Description Framework (RDF). Some
knowledge of RDF as well as RDB concepts and technologies is assumed
for readers of this document. The survey is intended to enable the
members of the W3C RDB2RDF Incubator Group to: (1) collate the
existing state of the art in mapping approaches between RDB and RDF,
and (2) use the reference framework defined in this survey to
effectively compare the different mapping approaches.

These are documents produced outside the RDB2RDF Working Group
that will be inputs to the standardization work of RDB2RDF WG. Please
alert the co-Chairs or Staff Contact of the Working Group if you know
of any material that you think merits inclusion.

Schedule of Deliverables

A specification for languages to map relational data and relational
schemas to RDF and OWL (tentatively called R2RML and Direct Mapping)
as W3C Recommendations.

A set of test cases to test conformance. It is up to the Working
Group to decide whether it wishes to publish this document as a W3C
Recommendation or as a Working Group Note.

Other Deliverables

These are deliverables that the group plans to produce, in line with
the scope description above, but only if the time and the available
manpower allows it. The Working Group will have to decide whether these
documents will be published as Working Group Notes or additional
Recommendations.

An alternate "human-readable" syntax for R2RML.

A set of profiles for R2RML sufficient to provide specific, simpler
functionality.

An R2RML primer.

Milestones

Specification

FPWD

LC

CR

PR

Rec, WG
Note, Wiki page

R2RML

9/2010

9/2011

12/2011

3/2012

6/2012 (Rec)

Direct Mapping

9/2010

9/2011

12/2011

3/2012

6/2012 (Rec)

R2RML Test Cases

3/2011

1/2012

3/2012 (Wiki pages)

Direct Mapping Test Cases

3/2011

1/2012

3/2012 (Wiki pages)

Note: The group will document significant
changes from this initial schedule on the group home page.

Timeline View Summary

September 2009: First teleconference

June 2010: First face-to-face meeting

July 2010: Requirements and Use Cases for the RDB2RDF Mapping
Language (R2RML)